Invacare® Pronto™ M41 Series
6 Service
6.1 General warning information on installation work
CAUTION!
Risk of injury and damage to property, if the maximum speed reduction on a mobility device with a lifter does
not function correctly
The mobility device’s control unit must reduce the maximum possible speed as soon as the lifter is raised.
– Test the maximum speed reduction for correct function after any maintenance work or modifications
to the mobility device.
6.2 Tightening torques
CAUTION!
Damage can be caused to the mobility device due to improperly tightened screws, nuts or plastic connections.
– Always tighten screws, nuts etc to the stated tightening torque.
– Only tighten screws or nuts which are not listed here fingertight.
The tightening torques stated in the following list are based on the thread diameter for the nuts and bolts for which no
specific values have been determined. All values assume dry and de-greased threads.
Thread
Tightening torque in Nm ±10%
M4
3 Nm
M5
6 Nm
M6
10 Nm
M8
25 Nm
M10
49 Nm
M12
80 Nm
M14
120 Nm
M16
180 Nm
UNC Thread
Tightening torque in Nm ±10%
1/4”-20
11–7 Nm
5/16”-20
22–14 Nm
3/8”-16
41–25 Nm
7/16”-14
67–40 Nm
1/2”-13
100–60 Nm
9/16”-12
150–90 Nm
5/8”-11
210–130 Nm
3/4”-1
370–230 Nm
7/6”-9
600–370 Nm
1”-8
900–550 Nm
6.3 Imperial to metric conversion chart
You can use this chart as an orientation to find the right tool size.
IMPERIAL
METRIC
inch
mm
5/64
1.9844
3/32
2.3813
7/64
2.7781
1/8
3.1750
18
1568396-C
